What Is MPG?
Miles per gallon (MPG) is the standard measurement of fuel efficiency used in the United States. It tells you how many miles your vehicle can travel on one gallon of fuel. A higher MPG means better fuel efficiency, lower fuel costs, and reduced environmental impact.
Tracking your MPG over time helps you identify changes in driving habits, maintenance needs, or mechanical issues that may be reducing your vehicle's efficiency.
MPG Calculation Formula
Average MPG by Vehicle Type
| Vehicle Type | City MPG | Highway MPG | Combined MPG |
|---|---|---|---|
| Compact Car | 28-32 | 35-42 | 31-36 |
| Midsize Sedan | 25-30 | 32-38 | 28-33 |
| SUV | 20-25 | 26-32 | 22-28 |
| Pickup Truck | 15-20 | 20-26 | 17-22 |
| Hybrid | 45-55 | 45-50 | 45-52 |
Tips to Improve Your MPG
- Maintain proper tire pressure -- underinflated tires reduce MPG by up to 3%.
- Remove excess weight from your vehicle -- every 100 lbs reduces MPG by about 1%.
- Use cruise control on highways to maintain steady speed.
- Avoid aggressive acceleration and hard braking.
- Keep up with regular maintenance (air filters, spark plugs, oil changes).
Frequently Asked Questions
How do I calculate MPG accurately?
Fill your tank completely, reset your trip odometer, drive normally until you need to refuel, fill up again, and divide the miles driven by gallons added. This gives you an accurate MPG reading for that tank.
What is a good MPG?
For a standard gasoline car, 25-30 MPG combined is average. Above 30 MPG is considered good, and above 40 MPG is excellent. Hybrids and EVs can achieve much higher equivalent ratings.
Why does my MPG vary?
MPG fluctuates based on driving conditions (city vs. highway), weather, tire pressure, vehicle load, driving style, air conditioning use, and fuel quality. Cold weather can reduce MPG by 10-20%.